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Topographic map is one of major tasks of national data infrastructure which is main concern with the economy, construction and people's livelihood of the country. So far, the series of basic topographic maps with scale of 1/5,000, 1/25,000, 1/50,000 and 1/100,000 as well as the Taiwan e-Map had been built for the whole country. Also the base charts of marine area and digital terrain model have been built step by step. Furthermore, these data have been shared widely and applied for a variety of objectives.

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